
/* 
Volume Control (SVG+JS animation)

Copyright (c) 2021 by Anton Mudrenok (https://codepen.io/mudrenok/pen/bBdoLJ)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Shot: https://dribbble.com/shots/2904489-Volume-Control-Micro-Animation
 */

"use strict";

$(document).ready(function () {

  var qs = function qs() {
    var el = arguments.length <= 0 || arguments[0] === undefined ? "" : arguments[0];
    return document.querySelector(el);
  };
  var fromTo = function fromTo(from, to) {
    var prgrs = arguments.length <= 2 || arguments[2] === undefined ? 0 : arguments[2];
    return from + (to - from) * prgrs;
  };
  var getCenter = function getCenter() {
    var line = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];

    return {
      x: (+line.getAttribute("x1") + +line.getAttribute("x2")) / 2,
      y: (+line.getAttribute("y1") + +line.getAttribute("y2")) / 2
    };
  };
  var getScalePoint = function getScalePoint() {
    var obj = arguments.length <= 0 || arguments[0] === undefined ? {} : arguments[0];
    var onScene = arguments.length <= 1 || arguments[1] === undefined ? true : arguments[1];

    if (!onScene) {
      var svgRect = obj.getBBox();
      return {
        x: svgRect.x + svgRect.width / 2,
        y: svgRect.y + svgRect.height / 2
      };
    }
    var rect = obj.getBoundingClientRect();
    return {
      x: rect.width / 2,
      y: rect.height / 2
    };
  };

  var volObj = {
    speakB: qs("#speakB"),
    arcBigB: qs("#arcBigB"),
    arcSmB: qs("#arcSmB"),

    speakF: qs("#speakF"),
    arcBigF: qs("#arcBigF"),
    arcSmF: qs("#arcSmF"),

    crossLtRb: qs("#crossLtRb"),
    crossLbRt: qs("#crossLbRt"),

    ctrlCirce: qs("#ctrlCirce"),
    ctrlLineF: qs("#ctrlLineF"),
    ctrlLineB: qs("#ctrlLineB")
  };

  var pathLen = {
    arcBigLen: volObj.arcBigF.getTotalLength(),
    arcSmLen: volObj.arcSmF.getTotalLength(),
    speakLen: volObj.speakF.getTotalLength()
  };

  var transforms = {
    translate3D: function translate3D() {
      var x = arguments.length <= 0 || arguments[0] === undefined ? 0 : arguments[0];
      var y = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];
      var z = arguments.length <= 2 || arguments[2] === undefined ? 0 : arguments[2];
      var el = arguments.length <= 3 || arguments[3] === undefined ? "px" : arguments[3];

      return "translate3D(" + x + el + ", " + y + el + ", " + z + el + ")";
    },

    translate: function translate() {
      var x = arguments.length <= 0 || arguments[0] === undefined ? 0 : arguments[0];
      var y = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];
      var el = arguments.length <= 2 || arguments[2] === undefined ? "px" : arguments[2];

      return "translate(" + x + el + ", " + y + el + ")";
    },

    rotate3d: function rotate3d() {
      var x = arguments.length <= 0 || arguments[0] === undefined ? 0 : arguments[0];
      var y = arguments.length <= 1 || arguments[1] === undefined ? 0 : arguments[1];
      var z = arguments.length <= 2 || arguments[2] === undefined ? 0 : arguments[2];
      var deg = arguments.length <= 3 || arguments[3] === undefined ? 0 : arguments[3];

      return "rotate3d(" + x + ", " + y + ", " + z + ", " + deg + "deg)";
    },

    rotate: function rotate() {
      var deg = arguments.length <= 0 || arguments[0] === undefined ? 0 : arguments[0];

      return "rotate(" + deg + "deg)";
    },

    scale: function scale() {
      var x = arguments.length <= 0 || arguments[0] === undefined ? 1 : arguments[0];
      var y = arguments.length <= 1 || arguments[1] === undefined ? 1 : arguments[1];

      return "scale(" + x + ", " + y + ")";
    },

    perspective: function perspective() {
      var val = arguments.length <= 0 || arguments[0] === undefined ? 0 : arguments[0];
      var el = arguments.length <= 1 || arguments[1] === undefined ? "px" : arguments[1];

      return "perspective(" + val + el + ")";
    }
  };

  var easing = {
    inCubic: function inCubic(t, b, c, d) {
      var ts = (t /= d) * t;
      var tc = ts * t;
      return b + c * (1.7 * tc * ts - 2.05 * ts * ts + 1.5 * tc - 0.2 * ts + 0.05 * t);
    },

    outElastic: function outElastic(t, b, c, d) {
      var ts = (t /= d) * t;
      var tc = ts * t;
      return b + c * (33 * tc * ts + -106 * ts * ts + 126 * tc + -67 * ts + 15 * t);
    },

    customSin: function customSin(t, b, c, d) {
      var ts = (t /= d) * t;
      var tc = ts * t;
      return b + c * (81 * tc * ts + -210 * ts * ts + 190 * tc + -70 * ts + 10 * t);
    }
  };

  var play = {
    dx: 1 / 5,
    ds: 0.03,
    flag: true,
    step: 0,
    speed: 5,

    curPosBig: {
      x: 0,
      y: 0,
      scale: 1
    },

    curPosSm: {
      x: 0,
      y: 0,
      scale: 1
    },

    curPos: 1,

    off: false,
    offCurStep: 100,
    offMaxStep: 100,
    offSpeed: 2,
    offRefresh: function offRefresh() {
      this.offCurStep = this.offMaxStep;
      this.off = true;
    },

    on: false,
    onCurStep: 0,
    onMaxStep: 20,
    onSpeed: 2,
    onRefresh: function onRefresh() {
      this.off = false;
      this.onCurStep = 0;
      this.on = true;
    },

    pointLbRt: getCenter(volObj.crossLbRt),
    pointLtRb: getCenter(volObj.crossLtRb),

    animation: function animation() {
      var _this = this;

      if (this.off) {
        // animation when volume became 0
        [volObj.arcBigB, volObj.arcBigF, volObj.arcSmB, volObj.arcSmF].forEach(function (el) {
          el.setAttribute("visibility", "hidden");
        });
        [volObj.crossLbRt, volObj.crossLtRb].forEach(function (el) {
          el.setAttribute("visibility", "visible");
        });

        var len = pathLen.speakLen;
        var step1 = 20;
        var step2 = this.offMaxStep - step1;
        var backLen = 0.7;

        if (this.offCurStep >= this.offMaxStep - step1) {
          var progress = (step1 + this.offCurStep - this.offMaxStep) / step1;
          var progressB = fromTo(1, backLen, 1 - progress);
          volObj.speakF.setAttribute("stroke-dasharray", len * progress + "," + len * 1.05);
          volObj.speakF.setAttribute("stroke-dashoffset", -len * (1 - progress) / 2 + "");
          volObj.speakB.setAttribute("stroke-dasharray", len * progressB + "," + len * 1.05);
          volObj.speakB.setAttribute("stroke-dashoffset", -len * (1 - progressB) / 2 + "");
        }

        if (this.offCurStep < step2 && this.offCurStep >= step2 - step1) {
          var progress = 1 - (this.offCurStep - step2 + step1) / step1;
          var progressB = fromTo(backLen, 1, progress);
          volObj.speakB.setAttribute("stroke-dasharray", len * progressB + "," + len * 1.05);
          volObj.speakB.setAttribute("stroke-dashoffset", -len * (1 - progressB) / 2 + "");
        }

        if (this.offCurStep < step2 && this.offCurStep >= 0) {
          (function () {
            volObj.speakF.setAttribute("visibility", "hidden");
            var progress = _this.offCurStep / step2;
            [volObj.crossLbRt, volObj.crossLtRb].forEach(function (el, index) {
              var scale = easing.outElastic(1 - progress, 0, 1, 1);
              var dx = index == 0 ? easing.customSin(1 - progress, -3, 3, 1) : easing.customSin(1 - progress, -2, 2, 1);
              var dy = index == 0 ? easing.customSin(1 - progress, -2, 2, 1) : easing.customSin(1 - progress, 2, -2, 1);
              var x = -_this.pointLbRt.x * (scale - 1) + dx;
              var y = -_this.pointLbRt.y * (scale - 1) + dy;
              el.setAttribute("transform", transforms.translate(x, y, "") + transforms.scale(scale, scale));
            });
          })();
        }
        this.offCurStep += -this.offSpeed;
      } else {
        (function () {
          if (_this.on) {
            [volObj.speakF, volObj.arcBigB, volObj.arcSmB, volObj.arcSmF].forEach(function (el) {
              el.setAttribute("visibility", "visible");
            });
            [volObj.crossLbRt, volObj.crossLtRb].forEach(function (el) {
              el.setAttribute("visibility", "hidden");
              el.setAttribute("transform", "scale(0)");
            });
            var len = pathLen.speakLen;
            var _progress = _this.onCurStep / _this.onMaxStep;
            volObj.speakF.setAttribute("stroke-dasharray", len * _progress + "," + len * 1.05);
            volObj.speakF.setAttribute("stroke-dashoffset", -len * (1 - _progress) / 2 + "");
            _this.onCurStep += _this.onSpeed;
          }

          var dxBig = undefined,
              dxSm = undefined,
              sclFactB = undefined,
              sclFactSm = undefined;
          if (_this.step >= _this.speed) {
            _this.flag = !_this.flag;
            _this.step = 0;
          }
          var progress = _this.step / _this.speed;
          var amplitudeB = 1 - easing.inCubic(1 - _this.curPos, 0, 1, 0.5);
          var amplitudeS = 1 - easing.inCubic(1 - _this.curPos, 0, 1, 1);

          if (_this.curPos < 0.5) amplitudeB = 0;
          if (amplitudeS <= 0 || !amplitudeS) amplitudeS = 0;

          if (_this.flag) {
            dxBig = fromTo(0, _this.dx * 3, progress);
            dxSm = fromTo(0, -_this.dx * 2, progress);
            sclFactB = fromTo(0, _this.ds, progress);
            sclFactSm = fromTo(0, -_this.ds, progress);
          } else {
            dxBig = fromTo(_this.dx * 3, 0, progress);
            dxSm = fromTo(-_this.dx * 2, 0, progress);
            sclFactB = fromTo(_this.ds, 0, progress);
            sclFactSm = fromTo(-_this.ds, 0, progress);
          }

          [volObj.arcBigF, volObj.arcBigB].forEach(function (el) {
            var scale = _this.curPosBig.scale + sclFactB * amplitudeB;
            var y = -drag.pointBig.y * (scale - 1) * 1.5;
            el.setAttribute("transform", transforms.translate(_this.curPosBig.x + dxBig * amplitudeB, y, "") + transforms.scale(scale, scale));
          });

          [volObj.arcSmF, volObj.arcSmB].forEach(function (el) {
            var scale = _this.curPosSm.scale + sclFactSm * amplitudeS;
            var y = -drag.pointSm.y * (scale - 1) * 3;
            el.setAttribute("transform", transforms.translate(_this.curPosSm.x + dxSm * amplitudeS, y, "") + transforms.scale(scale, scale));
          });
          _this.step++;
        })();
      }
      requestAnimationFrame(this.animation.bind(play));
    }
  };

  requestAnimationFrame(play.animation.bind(play));

  var drag = {
    dx: 0,
    maxX: +volObj.ctrlCirce.getAttribute("cx"),
    minX: +volObj.ctrlLineF.getAttribute("x1"),
    curCx: +volObj.ctrlCirce.getAttribute("cx"),

    pointBig: getScalePoint(volObj.arcBigF),
    pointSm: getScalePoint(volObj.arcSmF),

    interact: false,

    animateDrag: function animateDrag() {
      var _this2 = this;

      this.curCx += this.dx;
      var cx = this.curCx;

      var smLen = pathLen.arcSmLen;
      var bgLen = pathLen.arcBigLen;

      if (cx > this.maxX) {
        cx = this.maxX;
      }
      if (cx < this.minX) {
        cx = this.minX;
      }

      var progress = (cx - this.minX) / (this.maxX - this.minX);
      play.curPos = progress;
      document.getElementById('1').volume = progress;
	  document.getElementById('2').volume = progress;
	  document.getElementById('3').volume = progress;
	  document.getElementById('4').volume = progress;
	  document.getElementById('5').volume = progress;


      volObj.ctrlCirce.setAttribute("cx", cx);
      volObj.ctrlLineF.setAttribute("x2", cx);

      var scaleFactor = fromTo(1, 0.85, 1 - progress);
      var scaleDxBig = fromTo(0, -3, 1 - progress);
      var scaleDxSm = fromTo(0, -1, 1 - progress);

      [volObj.arcBigF, volObj.arcBigB].forEach(function (el) {
        play.curPosBig.x = -_this2.pointBig.x * (scaleFactor - 1) + scaleDxBig;
        play.curPosBig.y = -_this2.pointBig.y * (scaleFactor - 1) * 1.5;
        play.curPosBig.scale = scaleFactor;
        el.setAttribute("transform", transforms.translate(play.curPosBig.x, play.curPosBig.y, "") + transforms.scale(scaleFactor, scaleFactor));
      });

      [volObj.arcSmF, volObj.arcSmB].forEach(function (el) {
        play.curPosSm.x = -_this2.pointSm.x * (scaleFactor - 1) + scaleDxSm;
        play.curPosSm.y = -_this2.pointSm.y * (scaleFactor - 1) * 3;
        play.curPosSm.scale = scaleFactor;
        el.setAttribute("transform", transforms.translate(play.curPosSm.x, play.curPosSm.y, "") + transforms.scale(scaleFactor, scaleFactor));
      });

      if (progress > 0.5) {
        if (play.off) {
          play.onRefresh();
        }
        var prgForBig = fromTo(1, -1, 1 - progress);
        volObj.arcBigF.setAttribute("visibility", "visible");
        volObj.arcSmF.setAttribute("visibility", "visible");
        volObj.arcBigF.setAttribute("stroke-dasharray", bgLen * prgForBig + "," + bgLen * 1.05);
        volObj.arcBigF.setAttribute("stroke-dashoffset", -bgLen * (1 - prgForBig) / 2 + "");
        volObj.arcSmF.setAttribute("stroke-dasharray", smLen + "");
        volObj.arcSmF.setAttribute("stroke-dashoffset", "0");
      }

      if (progress <= 0.5 && progress > 0) {
        if (play.off) {
          play.onRefresh();
        }
        var prgForSm = fromTo(1, 0, 1 - progress * 2);
        volObj.arcBigF.setAttribute("visibility", "hidden");
        volObj.arcSmF.setAttribute("visibility", "visible");
        volObj.arcSmF.setAttribute("stroke-dasharray", smLen * prgForSm + "," + smLen * 1.05);
        volObj.arcSmF.setAttribute("stroke-dashoffset", -smLen * (1 - prgForSm) / 2 + "");
      }

      if (progress <= 0) {
        volObj.arcSmF.setAttribute("visibility", "hidden");
        if (play.off == false) {
          play.offRefresh();
        }
      }
    }
  };

  $(document).on("mousedown touchstart", "#ctrlCirce, #ctrlLineB, #ctrlLineF", function (e) {
    var startX = e.pageX || e.originalEvent.touches[0].pageX;
    e.preventDefault();
    drag.interact = true;

    if (this == volObj.ctrlLineB || this == volObj.ctrlLineF) {
      var rect = volObj.ctrlCirce.getBoundingClientRect();
      var center = (rect.left + rect.right) / 2.0;
      drag.dx = startX - center;
      drag.animateDrag();
    }

    $(document).on("mousemove touchmove", function (e) {
      e.preventDefault();
      var curX = e.pageX || e.originalEvent.touches[0].pageX;
      drag.dx = curX - startX;
      startX = curX;
      drag.animateDrag();
    });

    $(document).on("mouseup touchend", function (e) {
      if (drag.curCx < drag.minX) drag.curCx = drag.minX;
      if (drag.curCx > drag.maxX) drag.curCx = drag.maxX;
      $(document).off("mousemove touchmove mouseup touchend");
    });
  });

  var memory = {
    flag: true,
    last: 0
  };

  $(document).on("mousedown touchstart", ".speaker", function (e) {
    e.preventDefault();
    drag.interact = true;
    drag.dx = 0;
    if (memory.flag) {
      memory.flag = false;
      memory.last = drag.curCx;
      drag.curCx = 0;
      drag.animateDrag();
    } else {
      memory.flag = true;
      drag.curCx = memory.last;
      drag.animateDrag();
    }
  });

  // 2much animations in feed to do this ↓ smooth
  // (function pevAnimation() {
  //   for (let i = drag.maxX; i > -1; i -= 5) {
  //     setTimeout(() => {
  //       if (!drag.interact) {
  //         drag.curCx = i;
  //         drag.animateDrag();
  //       }
  //     }, 300 + drag.maxX - i);
  //   }
  //   for (let i = 50; i <= drag.maxX; i += 3) {
  //     setTimeout(() => {
  //       if (!drag.interact) {
  //         drag.curCx = i;
  //         drag.animateDrag();
  //       }
  //     }, 1400 + i);
  //   }
  // })();
});